LA PAZ, Bolivia — Bolivia’s invulnerability apportion says an bomb was used in a blast that has killed at slightest 4 people during Carnival celebrations – the second lethal blast to hit the city of Oruro during the celebrations.

Javier Zabaleta told ATB radio on Wednesday that the blast caused a hole so vast that officials don’t trust it could have been caused by a gas leak, as was creatively thought. In his words: “It wasn’t a gas leak. We’re traffic with an explosive.”

Firemen check the site where a gas bin exploded the prior day during a Carnival march in Oruro, Bolivia, Sunday, Feb. 11, 2018.

He says officials are trying to establish if Tuesday night’s blast is associated to another, circuitously blast that killed at slightest eight people Saturday.

Zabaleta didn’t assume on a probable ground for an attack. But Interior Minister Carlos Romero has pronounced 3 people have been incarcerated in the investigation.